New Post: DataTemplate and CurrentCulture

Hi,

I understand what you say.
But the property "ValidationDouble2" is a double and if you don't use a DataTemplate in the PropertyGrid's EditorDefinitions for type "Double", the default editor will be a DoubleUpDownEditor. This means a double value will be displayed with a double editor.
If you use a DataTemplate in the PropertyGrid's EditorDefinitions for type "Double" that is a TextBox, there need to be a conversion "double-string" (maybe the default converters could be ignoring the culture ?)
If you use a DataTemplate in the PropertyGrid's EditorDefinitions for type "Double", you should use a DoubleUpDown or a PropertyGridEditorDoubleUpDown. That should work.